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  1. D

    Minimum P to sample boxes

    I have N boxes, each of which may or may not contain a ball. I want to know how many boxes have balls by sampling the boxes in the following way. For each box in the N boxes: I open this box with probability P If at the end I find out K boxes have a ball, I estimate the number of boxes...
  2. D

    customer service problem

    N customers circulate in a closed system with two servers. In Server 1 and Server 2, service times are exponential with parameters µ1 and µ2, respectively. Let state K denotes that there are k customers in Stage 1(thus N-k customers in stage 2). I'd like to determine P(K), which is the...